Method of gripping and gutting sheet-glass



, '1L-fs. CAMPBELL.-

METHOD OF GREPPING AND CUTTING SHEE GLASS.

MPUCATEON FILED 020.23, 1919.

1@?5 Patented Feb. 8,1921,

3 SHEETS-SHEET i.

INVENTGR H. S. CAMPBELL.

METHOD oF GBIPPING AND Oumma SHEET GLASS.

K APPLICATION HLED DECl 23', l9l9.

fi" `tiff-IC.

. Y HUDSON S. CAMPBELL, OF CLARKSBURG, WEST VIRGINIA. n

METHOD OF GRIPPING AND CUTTING ASHIFIIET-GLASS.

Specification of Letters IPatent.

' Patented ren. e, rsa1.

Application mea December 23, 1919. serial No. 346,852.

To all lwhom t may concern.'

Be it known that I, HUDSON S. CAMPBELL, a citizen of the United States,and resident of Clarksburg, in the county of Harrison and State of WestVirginia, have invented a new and useful Improvement in Methods ofGripping and Cutting S heet -Glass`;and I do `hereby declare'thefollowing tobe a full, clear, andv exact description thereof:

My invention relates to a method of gripn ping and cut-ting sheet glass.

In an application led by me on the 12th day of February, 1919, SerialNo. 276,891, I have set forth'and claimed a method of drawing sheetglass in which the .sheet of glass is drawn continuously :from a moltenbath of glass, the glass being severed and simultaneouslyy therewith thesucceeding sheet is gripped while it is still in its plastic softcondition. In that methodV the glass. was severed by a knifey edge onone of the gripping bars Vcoperating with the oppositely arrangedgrippingv bar to sever or out Y the sheet transversely during Ithedrawing operation. The present 'inventiongrelates to a method by whichthiscutting orsevering of the sheet during the draw is accomplished byelectrical means,'provision being made for nicking the glasstransversely of the' sheet, and at the same time heating it along thisline electrically so that it may be readily broken or ycracked off-along this line of heat.

In the accompanying drawings, I have illustrated apparatus for carryingout my `improved method in which igure 1 is a view of a portion of afurnace with .the forehearth or dog-house extension showing in sectionwith the drawing apparatus arranged therein; Fig. 2 is a view taken atright angles to Fig.' 1; Fig. 3 is a crosssection on the line 3 3, Fig.1; Fig. 4 1s a perspective view of one of thegripping and nicking bars;Fig. 5 is a perspective View of one of the edge gripping barsgand Fig. 6is a cross-section of the gripping and nicking bars shown in connectionwith a portion of the chain.

In the drawings, the numeral 2 designates a portion of a suitable tankor furnace with the forehearth or dog-house 3 into which the glass 4iows from said furnace 2. In order to cut off to some extentl the heatof the furnace from the area from which the glass sheet is drawn tovpermit the glass to set properly in drawing, any suitable shielding 5mayk be employed.

rThe upper and lower shafts 6 and 7 are arranged in pairs parallel toeach other in suitable bearings, and mounted on said shaft at each endthereof are the sprocket-wheels 8 and 9, respectively. Chains 10 and 11are mounted on said sprocket-wheels, and power is provided for drivingsaid chains in opposite directions, as indicated by thearrows in Fig. 1.The links of the'chain are pro-` vided with gripping-blocks12 with theserrations or teeth 13 formed therein,as shown in Fig. 5. j

At intervals on the chain 10 are the bars 14 which extend' from onechain to the other, said bars havingnthe serrationsor corrugations 15.Secured in a 'seat formed in the uppermost ofy said serrations 15 is thecontact-bar 16 formedwith the knife edgefl'.

'This contact-bar may be'k formed of German silver or other suitablematerial adapted for the purpose.

' kThe chains 11 carry like gripping-bars 18 lwhich are provided withthe serrations or corrugations18a and set in a seat in the uppermostofsaid corrugations 18"" is the rontactbar 19 adapted to registerwith'the contact-bar 16, and said contact-bar 19 has the angular seat 20formed therein.

The bars 14 and 18 are so arranged that as the said Achains travel, saidbars will come into register with each other, the projections on one barregistering with the recesses of the other bar s0` as to grip the sheetbetween them as clearly shown in Fig. 6.

Secured to one of the ends of the bars 14 `and 18 are the contacts orbrushes 21 which molten glass in the forehearth or dog-house by loweringa suitable bait and lifting the glass up between the shafts 5 and 6until it is in position for the bars 14 and 18 to grip the same,whereupon said bars take hold of theV sheet of glass and the drawing 1sa continuous operation, said bars acting toV replace the bait. The edgesof the sheet are gripped by the gripping-blocks l2.

l/Vhen the contact-brushes 2l come into en-V gagement with the contactbars 22 the nicking bar 19 isYhea-ted electrically and like- Vwise thecorresponding bar 16. |This heat-y ing action will continue as long astheV brushes 2l and 2la are 1n vcontact with the nick ,toy such anextent as 'to be readily` cracked or brokenY oil". Vi By my method Iprovide a and e'icientmethod for severing the glass into' sheets 'of anydesired length, as it is apparentthat by changing the position of thegripping bars, the cutting action can be made to take/place at anydesiredV pointaccording to the size or" the sheet'desired.

VhatIclaiinris: v Y f l. The method of cutting glass consisting innicking the glass while in a plastic con-V dition, and subsequentlyheating vthe glass along the line of the niek.

' 2. The method of cutting glass consisting in nicking the glass whilein a plastic condition, and subsequently applying electricity to heattheV glass ,along the line of the nick. v

3. Themethod of cutting glass consisting veryY simple in nicliing theglass as it is being drawn into shape while in a plastic condition, andsubsequently heating the glass along the line oi the nick.

et. The method of cutting glass sheets consisting in drawing the glassfrom a molten bath, gripping the glass alongV the upper edge of thesheet, simultaneously therewith nicling .the glass, and subsequentlyheating the glass -along the line of the nick.

5. rlhe method of drawing and cutting glass consistingin diawingtheglass in the form of a sheet roma .bath of molten glass,

gripping the glassalong the upper edge of the sheet, simultaneouslytherewith nicling the ,glass transversely, and subsequently heating `theglass electrically along the line ofthe nick; o Y ,f Y

' 6.4 The method olf drawing and Ycutting glass'consisting. indrawinglthefgl'ass inthe form of a sheet from va bath of molten glasscontinuously,,gripping the; glass along the upper edge of the sheetsimultaneously Intestimony whereof, I, thesaid HUDSON S. CAMPBELL, havehereunto set vmy hand. Y

Y HUDSON S. CAMPBELL. 1Witnesses: Y- v Y E. DAVIS/SON. n'

